SKU: 12835143178

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FORD FALCON BA BF FG BOSS 260 290 5.4L V8

Sale price$63.00 Regular price$70.00
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Ships within 48 hours · Estimated delivery Jul 29 - Aug 3

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Description

MACE PERFORMANCE 6.35MM PLENUM SPACER TO SUIT FORD FALCON BA BF FG BOSS 260 290 5.4L V8Exclusive to Mace Engineering is our design registered plenum spacer to suit the Ford Boss 260 and 290 V8 engines. What is a plenum spacer and what does it do? A plenum spacer thermally separates the plenum cover and intake manifold. Its main purpose is to improve air distribution between cylinders by slowing down the air speed inside the plenum chamber. As a result there is less of a pressure drop inside the plenum chamber between cylinders, and less

Exclusive to Mace Engineering is our design-registered plenum spacer to suit the Ford Boss 260 and 290 V8 engines.

 

What is a plenum spacer and what does it do?

A plenum spacer thermally separates the plenum cover and intake manifold. Its main purpose is to improve air distribution between cylinders by slowing down the air speed inside the plenum chamber. As a result there is less of a pressure drop inside the plenum chamber between cylinders, and less air momentum, resulting in better air distribution and power. The change in airflow characteristics is shown in the diagram below.

 

 

Not only will our spacer help you make more power, it will also help prevent any costly rebuilds through dangerous lean outs that occur with standard manifolds in high horsepower/boost applications (due to poor air distribution).

In addition to improving air distribution between cylinders, the increase in plenum volume also has a positive effect on bottom end torque.

The fact these spacers are manufactured from the same thermal resistant composite material as our manifold insulators means further horsepower gains are possible due to the reduction in heat soak.

 

Key benefits:

  • Design registered.
  • Reduces charge air temperature resulting in better power consistency and detonation prevention.
  • Power increase with no undesirable side effects.
  • Improved air distribution between each cylinder.
  • Improved fuel economy.
  • Easy to install.
  • Can be used as a replacement gasket.
  • Reusable.
  • Proven gains at an affordable price.

 

Contents:

  • 01 XPlenum spacer
  • 01 X Silicone gasket maker
  • 04 X Spacer bush

Vehicle Fitment Guide

 

Note: Installation is very straight forward, requiring only the removal of your plenum cover to install the plenum spacer.

Shipping Notes
  • Free Standard Shipping on $100+ Orders to the USA.
  • Except Preorder products are shipped in 48 hours.
  • Delivery to the USA:
  1. Standard Shipping : 3-10 business days
  • If time is of the essence, please consider selecting expedited delivery for faster service.
Exchange/Return Notes
  • We offer a 30-day return/exchange service after receiving.
  • Final sale items are not eligible for returns or exchanges.
  • To process your return/exchange, please contact us at [email protected]
  • Please click here for more details>>> Return & Exchange Policy
SKU: 12835143178

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Annie B
Pawtucket, US
★★★★★ 5
Great product
Color: Stand Black 1, Size: Battery
Great product
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Reviewed in the United States on March 13, 2026
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Ines munoz
Lexington, US
★★★★★ 1
No tiene velocidad
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No tiene mucha fuerza, la verdad no me sirvió
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Reviewed in the United States on April 29, 2026
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Lis
Boise, US
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Espumador especial
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Muy bueno y bonito
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Reviewed in the United States on April 29, 2026
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Chelsea, US
★★★★★ 5
Great Little Gadget
Color: C-Black, Size: Model C Rechargeable
What a fun and easy to use gadget! I use it to foam Zero Sugar Coffeemate creamer for my iced coffee and it works perfectly. I thought the on/off button was on the top but it's on the side. I was concerned that I would unintentionally bump it but I don't. Easy to use, easy to clean and price is reasonable.
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Reviewed in the United States on May 2, 2026
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Billy
Lowell, US
★★★★★ 4
Good speed
Color: C-Black, Size: Model C Rechargeable
Love the rechargeable feature, works great as a frother, however, I have to get use to the on/off feature instead of the press to froth like the older unit.
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Reviewed in the United States on March 22, 2026

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